The U1393 from Mercury Systems is a Band Pass Filter with Frequency 174 MHz, Bandwidth 25 to 40 MHz @ 3 dB, 80 MHz @ 30 dB, Insertion Loss 1 dB, VSWR 1.40:1, Operating_Temperature -55 to 85 Degree C. Tags: Surface Mount. More details for U1393 can be seen below.